LEOTEK LD Series Traffic Signal Module – 12″ Bi-Modal Arrow 80-135Vac, Yellow Yellow
The LD Series Bi-Modal Arrow module delivers two yellow arrow indications from a single 12″ LED unit, providing reliable directional control for turn-lane and advanced signal applications. Engineered for superior safety, the module features a fail-state impedance design and a precise arrow display configurable in horizontal, vertical, or angular orientations. With robust materials and proven LED technology, it reduces maintenance, improves color uniformity, and optimizes traffic flow.
Features
- 12″ bi-modal arrow module
- Two selectable indications within one signal face
- 80-135Vac operation
- Uniform LED optics with wide viewing performance
- For compatible arrow-signal housings
- Energy-efficient retrofit-ready design
LD Bi-Modal Arrow in Real-World Traffic Applications
PDF-Verified Model & Performance Data
Source: LD Series 12-inch Yellow/Green and Yellow/Yellow Arrows Traffic Signal Specification Sheet
| Model | First Indication | Second Indication | Typical Power | Wavelength | Minimum Maintained Intensity |
|---|---|---|---|---|---|
| TSL-12YYBM-LD-A1 | Yellow arrow | Yellow arrow | 6.2W / 6.2W | 589 / 589 nm | 130 / 130 cd |
Electrical & Compliance Data
| Input voltage | 80–135Vac |
|---|---|
| Operating temperature | -40°C to +74°C |
| Switching time | Below 75 ms |
| Turn-off threshold | Above 35Vac |
| Power quality | Power factor above 0.9; total harmonic distortion below 20% |
| Compliance | FHWA application specification shown in the controlled PDF |
| Transient / EMC | FCC; MIL-STD-810F / 883; IEC 3 kV; 6 kV ring wave |
Technical FAQ
What does yellow/yellow bi-modal mean on this LD arrow?
This LD listing is the Yellow→Yellow two-mode arrow configuration. The separately listed LD Yellow→Green model serves a different indication sequence; select the one specified by the signal plan.
Can I substitute it for the yellow/green LD module?
Do not substitute on size and voltage alone. Confirm the two required colors, controller sequence, complete catalog number and current wiring diagram.
What housing, lens and input does this page specify?
It lists a 12-inch arrow module with a clear lens and nominal 120Vac input (80–135Vac range). Confirm mounting orientation and terminals for the selected installation.
Specifications
Family
Series
Certification
Color
Indication
Color of Lens
Lens Size
Warranty
Voltage
Terminals
Resources
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